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Article #48

Re: panic faulting when out of memory

#48
From: Dave Olson
Date: Wed, 06 Jan 1993 04:04
41 lines
2282 bytes
In <Jan05.220529.70886@yuma.ACNS.ColoState.EDU> jamison@yuma.ACNS.ColoState.EDU (Jamie Gulden) writes:


| This probably isn't a bug but...
| 
| Does IRIX (4.0.4) normally panic fault if it runs out of swap
| space?  I've got a short 5-7 line program that I try to find
| out how much memory I can allocate and it keeps panic faulting.
| 
| The syslog has a bunch of these:
| 
| Jan  5 13:52:35 nagel unix: dks0d3s1: Swap out failed blkno 0x3C514 (page still in memory)
| Jan  5 13:52:35 nagel unix: 
| Jan  5 13:52:35 nagel unix: dks0d3s1: Swap out failed blkno 0x3C834 (page still in memory)
| Jan  5 13:52:35 nagel unix: 
| Jan  5 13:52:35 nagel unix: dks0d3s1: Swap out failed blkno 0x3CA9C (page still in memory)
| Jan  5 13:56:53 nagel syslogd: restart
| 
| 
| And then the system comes up with this:
| 
| Jan  5 13:57:04 nagel syslogd: restart
| Jan  5 13:57:05 nagel savecore: reboot after panic: 
| Jan  5 13:57:05 nagel PANIC: swapoutpts - i/o error in swap
| 
| 
| So, is there a disk I/O problem, did we tell it to use more blocks
| than there actually are, or something else I'm missing.

It isn't an out of swap problem at all.  There is a disk error
of some kind, *or* you have somehow configured the system to believe
that there is more swap space than will fit on that partition.

There are a couple of places in the swapping code where the system
is fully committed, and can't recover on an error; in most cases it
will just kill the process that it was trying to swap (or retry it
later).
--
Let no one tell me that silence gives consent,  |   Dave Olson
because whoever is silent dissents.             |   Silicon Graphics, Inc.
    Maria Isabel Barreno                        |   olson@sgi.com
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References: <Jan05.220529.70886@yuma.ACNS.ColoState.EDU>

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From: olson@anchor.esd.sgi.com (Dave Olson)
Subject: Re: panic faulting when out of memory
Message-ID: <uh43lv0@zuni.esd.sgi.com>
Sender: news@zuni.esd.sgi.com (Net News)
Organization:  Silicon Graphics, Inc.  Mountain View, CA
References: <Jan05.220529.70886@yuma.ACNS.ColoState.EDU>
Distribution: usa
Date: Wed, 6 Jan 93 04:04:58 GMT
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